Q:

What does the following statement do?

0

What does the following statement do?

CREATE INDEX lower_title_idx ON books ((lower(title)));

  1. Modifies an index in place to be lowercase
  2. Creates a new index with a special operator class ‘lower’ for case insensitive comparisons.
  3. Creates an index for efficient case-insensitive searches on the titles column within the books table
  4. Nothing, it’s invalid SQL
  5. Creates a non-write-locking index

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Correct Answer:

C.Creates an index for efficient case-insensitive searches on the titles column within the books table

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